ADS774x

ADS774x

1

FEATURES

DESCRIPTION

APPLICATIONS

Comparator

2.5VReference

Input

CDAC

10VRange

20VRange

Bipolar

Offset

2.5VReference

Output

Control

Inputs

2.5V

Reference

Clock

Successive

Approximation

Register

ControlLogic

Status

Parallel

Data

Output

ADS774H

Microprocessor-Compatible Sampling

CMOS ANALOG-TO-DIGITAL CONVERTER

2

• Drop-In Replacement for the ADS774

The ADS774H is a 12-bit, successive-approximation

analog-to-digital

converter

(ADC)

that

uses

an

• Complete Sampling ADC with Reference,

innovative capacitor array (CDAC) implemented in

Clock, and Microprocessor Interface

low-power CMOS technology. This device is a drop-in

• Fast Acquisition and Conversion: 8.5µs Max

replacement for the ADS774, with internal sampling,

Over Temperature

much lower power consumption, and the ability to

• Eliminates External Sample/Hold in Most

operate from a single +5V supply.

Applications

The ADS774H is complete with an internal clock,

• Ensured AC and DC Performance

microprocessor interface, three-state outputs, and

internal scaling resistors for input ranges of 0V to

• Single +5V Supply Operation

+10V, 0V to +20V, ±5V, or ±10V. The maximum

• Low Power: 120mW Max

throughput time is 8.5

µs over the full operating

temperature range, including both acquisition and

conversion.

Complete user control over the internal sampling

• Medical Instrumentation

function facilitates elimination of external sample/hold

• Data Acquisition Systems

amplifiers in most existing designs.

• Robotics

The ADS774H requires +5V, with –15V optional. No

• Industrial Control

+15V supply is required. Packages include a 28-pin

• Test Equipment

• Digital Signal Processing

• DSP Servo Control

(1)

DIP-28 package is product preview.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2009, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.